Polygons Not Polygons.

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Presentation transcript:

Polygons Not Polygons

What is the definition of a polygon? Answer A closed flat 
figure with at least 
three straight 
sides

Quadrilaterals Not Quadrilaterals

What is the definition of a quadrilateral? Answer A polygon with 
four sides

Parallelograms Not Parallelograms

What is the definition of a parallelogram? Answer A quadrilateral 
with two pairs of 
parallel sides

Rectangles Not Rectangles

What is the definition of a rectangle? Answer A quadrilateral 
with four right 
angles and two 
pairs of parallel 
sides

Square Not Squares

What is the definition of a square? Answer A quadrilateral 
with four right 
angles, two pairs 
of parallel sides, 
and all sides equal

Rhombus Not Rhombus

What is the definition of a rhombus? Answer A quadrilateral 
with two pairs of 
parallel sides and 
all sides equal

Trapezoids Not Trapezoids

What is the definition of a Trapezoid? Answer A quadrilateral 
with exactly one 
pairs of parallel 
sides

What is the definition of a regular polygon? Answer A polygon with all 
sides and angles 
congruent What is the definition of 
a regular polygon? What do we call a regular triangle? Equilateral triangle What do we call a regular quadrilateral? Square

Classify each quadrilateral in as many ways as 
possible by dragging the terms and placing them 
on top of the shape. Terms may be used more 
than once. trapezoid quadrilateral trapezoid square quadrilateral square rhombus quadrilateral rhombus parallelogram parallelogram parallelogram quadrilateral rectangle rectangle rhombus rectangle quadrilateral parallelogram

A polygon is convex if any two interior points can be connected 
with a segment that lies completely with in the polygon. A polygon is concave if any two interior points cannot be 
connected with a segment that lies completely with in the polygon. B.) Draw an example of a concave polygon A.) Draw and example of a convex polygon.

The sum of the angles of a quadrilateral is 360 . Sum of the Interior Angles of a Quadrilateral If you draw a diagonal of a quadrilateral, you will get two triangles. 1.) Use this information to find the sum of the interior angles of a 
quadrilateral. The sum of the angles of a quadrilateral is 360 .

Write an equation to find the value of x and then find the value of each missing angle. xo (2x + 1)o

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